Dynamo-electric machine



(NC Model.)

W. P. COLLINS.-

DYNAMC ELECTRIC MACHINE.

No. 435,0 1 5. Patented Aug. 26., 1890.

W/T/VESSES.'

ATTORNEY.

ma nonms neas co., wow-umn., wnsummon, u, c4

UNITED STATES PATENT OFFICE.

VILLIAM FORMAN COLLINS, OF NEV YORK, N. Y., ASSIGNOR OF ON E-FOURTI-IT() IVM. A. ROSENBAUM, OF JERSEY CITY, NEV JERSEY.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 435,015, dated August26, 1890.

Application filed July 27, 1889. Serial No-3l3i825 (No model.)

To @ZZ whom t may concern:

Be it known that I, VILLIAM FORMAN COL- LINS, a subject of thc Queen ofGreat Britain, and a resident of the city, county, and State of NewYork, have invented certain new and useful Improvements in DynamoElectric Machines, of which the following is a specilication.

This invention relates to dynamo-electric xo machines and motors, theobject being to provide a simple construction which shall be efficientin operation.

The machine has but a single eld-coil, which 4is wound upon an ironspool, the heads of which are in the form of disks having pole-piecesprojecting inward toward each other from their centers. The spool ismade hollow to accommodate the armature, and in some cases thecommutator and brushes, zo which are mounted upon a shaft running atright angles to the axis of the coil.

The invention also embraces other details relating to the manner ofsupporting the armature-shaft, vall of which will be fully set forth inthe following` description.

Referring to the accompanying drawings, Figure l represents aperspective view of the machine. Fig. 2 represents a central sectiontaken at right angles to the axis of the coil. Fig. 3 represents asection taken at rightangles of the armature-shaft. Fig. 4 is a de-'tailed view vof the bearing for the armatureshaft. Fig. 5 is a faceviewot' the detail, and Fig. 6 is a detail view.

The improvements herein relate only to the construction of thefield-magnet, the machine being adapted for any style of armature. Iprefer to use the Siemens armature, however, because its shape is betteradapted for this machine. The field-magnet is a spoolshaped bodyconsisting of a .cylindrical portion a and two iron heads or disks a a2.The heads extend outward beyond the cylinder to form flanges, betweenwhich a coil ot' wire b 45 is located, the cylinder a serving as'amechanical core upon which the coil is wound. Upon theinner or adjacentsides of the disks or heads are formed projecting pole-pieces p, betweenwhich the armature is placed. The

5o general shape of the machine is therefore like an ordinaryspool-magnet whose diameter is greater than its length. Nonr themagnetic circuit of such a structure would be through the iron disks orheads, across the armature-space, and across the air-space on theoutside of the coil between the flanges. A part of the magnetic lines,however, might shuntthearmature-spacebytravelingthrough the cylinder c;but this part of the circuit would soon become saturated," and the over-6o flow or major portion of the lines would cross the armature-space. Atdiametrically-opposite points the cylinder a is perforated, as shown inFig. 2, to accommodate bearings for the armature-shaft- One of theseperforations is made large enough to admit the Whole armature, and theother is simply large enough to form the bearing of the shaft, a boss cbeing provided for this purpose. Abovev and below the bearings on eachside I have pro- 7o vided the triangular-shaped lugs d3. These part thewire and render the winding smooth.

To facilitate the operation of removing the armature from the machine Ihave provided the plate d, which is made to fit the large perforationc.v This plate forms one of the bearings for the armature-shaft and alsosupports two brush-holders e c, mounted on a pivoted yoke e and passingthrough slots e2 in the plate. position of the brushes is changed.Setscrew c3 secures the yoke. The plate is secured in place by bolts dd', and by removing these bolts the whole plate, together with thearmature, commutator brushes, and shaft may be withdrawn. The edges ofthe plate may be provided with flanges (Z2, which serve to part thewinding and prevent its encroachment upon the plate.

In Fig. G I have shown the flanges on the 9o heads of the magnetslightly distorted adjacent to the bearings in order to provide roomenough for the Wire. It will be observed that n the box-like form of thefield-magnet will insure protection of the armature.

In order to ventilate the machine without providing a passage forforeign substances, I connect two pieces of tubing t t, either flexibleor rigid, at opposite points on the structure and provide for theircommunication with Ioo the interior'space. The ends of the tubes arebell-shaped and covered with gauze.

By swinging the yoke on its pivot the 8o' The machine may be supportedin any suitable manner. I have shown brackets or feet ff for thispurpose.

In Fig. 3 the dotted lines represent a dis- 5 torted or diagonalarrangement of the coil with respect to the armature and shaft.

Having thus described my invention, I claim*- l. In a dynamo electricmachine, a ield-A Io magnet having a single coil, the conductorsconstituting` the same being parted or divided at a point sufficientlyto permit the armature to be passed through the opening', inconibination With the armature located Within the 15 goil.

2. A field-magnet consisting of a single spool upon which a single coilis Wound, a

chamber being formed inside the spool, and pole-pieces projecting fromthe heads of the spool into said chamber, in combination with anarmature located inside the spool, the shaft of Whichis at right anglesto the axis of the spool, the Wire of the coil being parted and thespool perforated to form an opening large enough to allow the armatureto pass through it. c

vIn Witness whereof I have hereunto signed my name in the presence oftwo subscribing Witnesses.

WILLIAM FORMAN COLLINS.

Witnesses:

WM. A. RosENBAUM, Y THos. K. TRENcHARD.

